This was a Phase 1 multicenter study of bendamustine, rituximab and TRU-016 (BRT) in subjects with relapsed indolent B-cell lymphoma. This was a multiple-dose escalation study to determine the maximum-tolerated dose (MTD) of TRU-016 given in combination with rituximab and bendamustine and to determine a safe dosing regimen for the combination in up to 12 subjects with relapsed indolent lymphoma.